How Do Liquids Be Transported? The Magic Moment Of The Water Pump

Today, we are going to introduce a little-known "liquid transporter" - the water pump. In this week's Del's Mini Classroom, we will take you into the world of water pumps and enable you not only to understand them but also to "fix" them!
Imagine you are spinning a wet rain伞, and the water droplets are forcefully thrown around - this is the core magic of the centrifugal pump (the most common type of water pump)! Its secret weapon is the high-speed rotating impeller：
Start the magic - after powering on, the impeller rotates like a top at high speed.
Centrifugal water discharge - the water is forcefully thrown towards the edge of the pump casing, forming a high-speed water flow.
Pressure generation - the discharged water slows down in the conical pump casing, and the kinetic energy magically converts into water pressure, resulting in lift height (how high the water can be lifted) being generated!
Continuous transportation - the central low-pressure area "sucks" in new water, and the water flow continues in a cycle.
Clearwater Centrifugal Pump (Home MVP)：
Appearance - simple structure, moderate size.
Specialties - transporting tap water, irrigation water, etc. "clean water", with a moderate lift height (several meters to several tens of meters).
Location - home pressure boosting, garden watering, small fountains.
Submersible Pump (The "Ninja" Underwater) ：
Appearance - motor and pump integrated, fully waterproof, works directly underwater.
Specialties - directly pumps water from wells, ponds, pits, etc., eliminating the need for "suction", with high efficiency and low noise.
Location - deep well water extraction, fish pond circulation, basement drainage.
Sewage Pump / Impurity Pump (The "Dirty Cleaner") ：
Appearance - wide passage, special impeller (such as vortex type, tearing type), not afraid of blockages.
Specialties - specifically dealing with "dirty water" and "waste water" containing sand, leaves, even small particles.
Location - basement drainage, construction site drainage, sewage treatment.
When the water pump "gets angry"? Troubleshooting kit for water pump malfunctions!
Symptoms： No water at all?
Check the power supply： Is the plug loose? Is the switch on? Has the circuit breaker tripped? (Most often overlooked!)
Check the water source： Is there water in the source? Is the inlet or filter screen blocked? (Commonly occurs when the pump is running empty)
Check the seal： Is there severe leakage in the pump body or pipeline? (Centrifugal pumps rely on negative pressure to suck in water, and leakage causes failure)
Symptoms： Low water volume / Insufficient pressure?
Check for blockages： Are the inlet filter screen, impeller passage, outlet valve or pipeline partially blocked?
Check for wear： Has the impeller or pump casing become severely worn and efficiency decreased after long-term use?
Check the voltage： Is the voltage too low, causing the motor to be ineffective? Is the pipeline too thin or long, causing high resistance?
Symptoms： Abnormal noise / Vibration is too loud?
Check the installation： Is the pump not firmly installed, with loose screws?
Check cavitation： (Professional term!) Excessive suction height or poor water intake, water "boiling" in the pump and generating bubbles that burst (extremely harmful! Lower the installation height or increase the diameter of the inlet pipe).
Check the bearings： Are the motor or pump bearings worn and damaged? (Requires professional repair)